If your phone keeps overheating while you are on calls, when you’re gaming, charging or even just sitting there doing nothing, you’re not alone. With that in mind, it is one of the most common customer complaints Phonezones (Perth’s trusted mobile phone repair specialists) get. And some heat during heavy use is absolutely normal, but constant or sudden warmth is a warning sign you should never ignore.
Heat is a smartphone’s worst enemy. It degrades your battery faster, throttles your processor’s performance, and in serious cases, causes permanent damage to internal components. The good news? Most overheating problems are fixable, often without needing to replace your device.
This guide covers the most common causes of phone overheating and the practical, step-by-step fixes you can apply today.
Is It Normal for Phones to Get Hot?
Yes — to a point. When the CPU and GPU work hard, they generate heat, in phones too. Watching streaming video, playing graphics-intensive games and running GPS navigation all demand heavy lifting from your processor, which naturally generates heat as a byproduct.
Most smartphones are said to be safe between 0 °C and 35° C (32–95 °F). When your phone regularly drains all the way through this range, especially during light usage or while idle, something is off.
7 Common Reasons Your Phone Keeps Overheating
1. Running Power-Hungry Apps
3D games, video streaming, video calls, and GPS apps push your CPU and GPU to their limits. This is expected under heavy load, but if your phone is still hot 10–15 minutes after closing those apps, the issue goes deeper than normal usage.
Quick Fix: Close background apps and restart your device. On Android, go to Settings > Battery > View Details to identify high-drain apps. On iPhone, check Settings > Battery.
2. Too Many Apps Running in the Background
Many apps — particularly social media, weather, and messaging apps — continue refreshing in the background even after you’ve swiped them away. This constant activity drains your battery and heats up your phone simultaneously.
Quick Fix: On iPhone, go to Settings > General > Background App Refresh and disable it for non-essential apps. On Android, go to Settings > Apps > [App Name] > Battery and select “Restricted”.
3. Faulty or Third-Party Charger
Charging generates heat, that’s unavoidable. But using a cheap, uncertified, or damaged charger causes irregular power delivery that forces your phone’s charging circuit to overwork. Wireless charging also produces more heat than a wired connection due to energy conversion inefficiency.
Quick Fix: Always use your original charger or a certified replacement. Never charge on soft surfaces like beds or sofas, they trap heat and block airflow. Remove your phone case while charging if it consistently runs warm.
4. Environmental Heat — Perth Summers Are No Joke
Leaving your phone on a car dashboard, windowsill, or in direct sunlight is one of the fastest ways to push it past its safe operating temperature. Perth’s summer heat can be extreme, and your phone’s internal components are highly sensitive to ambient temperature spikes.
Quick Fix: Keep your phone shaded and never leave it in a parked car. If it displays an overheating warning and shuts down, move it to a cool, shaded spot immediately. Do not put it in the freezer; thermal shock from rapid cooling can damage internal components.
5. Outdated Software or Buggy Apps
An unpatched operating system or a buggy app can get stuck in a processing loop — consuming far more CPU cycles than it should, even when you’re not actively using your phone. This hidden drain generates significant heat and accelerates battery wear.
Quick Fix: Keep your OS and all apps updated. On iPhone: Settings > General > Software Update. On Android: Settings > System > Software Update. If one specific app is the culprit, uninstall and reinstall it.
6. Poor Signal Strength (Wi-Fi or Cellular)
When your Wi-Fi or mobile signal is weak, your phone’s antenna works overtime — constantly scanning and reconnecting to maintain a stable connection. This extra radio activity consumes significant battery power and produces heat in the process.
Quick Fix: In low-signal areas, enable Aeroplane Mode if you don’t need connectivity, or manually toggle off Wi-Fi when relying on mobile data. Avoid streaming video in areas with poor reception.
7. Malware or Spyware
This is the most serious and most overlooked cause of overheating. Spyware, cryptomining malware, and adware run silently in the background — hijacking your phone’s processor without your knowledge. A phone that’s consistently hot when idle, with no obvious explanation, should raise an immediate red flag.
Quick Fix: Check your battery usage for unfamiliar apps consuming high CPU resources. Run a reputable mobile security scan. If you can’t identify the culprit, a factory reset (after backing up your data) may be necessary.
When to See a Professional — Signs of Hardware Damage
Software fixes won’t solve every overheating problem. If you’ve tried the steps above and your phone is still running hot, there may be a hardware fault involved. Watch for these warning signs:
- Swollen battery: A battery that’s bulging generates dangerous heat as it fails and needs immediate replacement.
- Overheating after a drop: Physical damage can short internal components, causing abnormal heat buildup.
- Hot during standby: If your phone is warm after hours of inactivity, a hardware component may be failing.
- Rapid battery drain alongside heat: This usually indicates a failing battery or a damaged charging port.
At Phonezones, we provide professional battery testing and replacement as part of our fix my phone Perth service. We also specialise in Samsung screen repair, phone screen replacement Perth, and full smartphone screen repair Perth, all with fast turnaround times.
Quick Overheating Fixes — At a Glance
- Remove your case and let your phone cool on a flat, hard surface
- Close all open apps and perform a full restart
- Turn off Wi-Fi, Bluetooth, and GPS when not actively using them
- Lower screen brightness and disable auto-sync for unused accounts
- Disable Background App Refresh for non-essential apps
- Update your OS and all installed apps immediately
- Switch to a certified OEM charger and stop using your phone while it charges
- Keep your phone shaded — never leave it in a hot car or direct sunlight
- If the problem persists, visit a professional smartphone repair shop in Perth for a diagnosis
How Overheating Damages Your Phone Long-Term
- Battery degradation: Lithium-ion batteries lose capacity faster under sustained heat. A battery that should last 3 years may fail in under 18 months.
- CPU throttling: Your phone deliberately slows itself down to manage heat — this is why an overheating phone often feels sluggish.
- Screen damage: Prolonged heat causes discolouration, dead pixels, and display delamination — often requiring phone screen replacement Perth.
- Solder joint failure: Repeated heat cycles can crack internal solder joints, leading to component failure.
Frequently Asked Questions
Q: Why does my phone get hot when I’m not using it?
A phone that overheats at idle is almost always caused by a background app consuming excessive CPU, malware running silently, or a failing battery. Check your battery usage settings and look for unfamiliar or high-drain apps.
Q: Is it bad to use my phone while it’s charging?
Yes — charging and active use create a double heat load on your battery and processor. If you must, choose wired over wireless and avoid resource-heavy apps.
Q: Does a phone case cause overheating?
Thick or non-breathable cases trap heat and block dissipation. Try removing the case during extended use or charging. Look for cases with ventilation channels if overheating recurs.
Q: Why does my Samsung phone overheat when gaming?
Samsung’s processors run very hot under sustained gaming loads. Optimise Game Booster settings, close background apps, and avoid gaming while charging. If a previous drop caused internal damage, visit us for Samsung screen repair or diagnostics.
Q: How hot is too hot for a phone?
Most manufacturers recommend staying below 35°C (95°F). If your phone is too hot to hold comfortably for more than a few seconds, power it down and let it cool.
Q: Can a cracked screen cause overheating?
Not directly, but moisture or debris entering through a crack can cause short circuits and heat. If overheating started after a crack, visit Phonezones for phone screen replacement Perth.
Q: Can overheating permanently damage my phone?
Yes. It permanently reduces battery capacity, can damage your display, and in extreme cases can damage the motherboard. Address it early.
Q: What’s the fastest way to cool down an overheating phone?
Power off the screen, close all apps, remove the case, and place it on a flat hard surface in a cool room. Never use a fridge or freezer; condensation will damage the internals.
Still Overheating? Visit Phonezones in Perth
If your phone keeps overheating and home fixes haven’t worked, it’s time for a professional diagnosis. At Phonezones, we repair overheating issues across all major brands, including iPhone, Samsung, Google Pixel, and more.
Our services include battery replacement, Samsung screen repair, phone screen replacement Perth, charging port repair, and full smartphone screen repair Perth, with same-day service available.
Don’t wait until the damage is irreversible. Contact Phonezones today, your trusted mobile phone repair Perth specialists.
